Proposed Guidelines

In response to Senate Bill (SB) 743, the County is proposing a Transportation Study Guide (TSG) with guidelines for analyzing Vehicle Miles Traveled (VMT) for the purposes of CEQA and other related transportation analyses, such as Level of Service, for non-CEQA purposes. The draft TSG contains a range of options for VMT analysis from which the Board of Supervisors may select a preferred approach. The Board hearing will be held in June 2020. Subscribers to the SB 743 email subscriber list will receive a notification once the hearing date is confirmed.

The full TSG document can be viewed here on the project’s Public Review Page.

This page includes information for how to submit comments on the TSG. The official public review period closes June 8, although general comments may still be submitted through the project email (PDS.advanceplanning@sdcounty.ca.gov) and/or the Board of Supervisor’s eComment system, which will be opened in advance of the hearing.

Please see below for the introduction to the TSG:

TSG Intro

As an additional tool to help readers understand the VMT Efficient Areas Screening Map Options included in the TSG’s Appendix C, below is an interactive map viewer which includes all nine map options. The various layers included in the map options in Appendix C can be found in the navigation pane on the right side of the map viewer. Please note, if multiple layers are turned “on” at the same time, the map viewer will display whichever layer is farther to the top of the navigation pane.

For each map option, you will see three color intensities:

  • Darkest color (at least 15% below the average VMT). This means that projects in this area will likely be considered as having a less than significant VMT impact and will not have to conduct further VMT analysis.
  • Medium color (between 0% - 15% below the average VMT). This means that projects in this area are likely to have a significant VMT impact, but one that could potentially be mitigated with VMT reducing measures down to 85% or lower of the regional average.
  • Light color (above the average VMT). This means that projects in this area are likely to have a significant VMT impact and are unlikely to fully mitigate that impact.

The VMT Efficient Areas Screening Maps are one tool that may be used to determine whether projects have to conduct further VMT analysis. For information on all screening criteria, as well as how the maps can be used, please see Chapter 3 of the TSG.

To learn more, click the below icons:

Proposed Guidelines